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US 4,686,064 AGranted
Composition for the desulphatizing cleaning of carbonatic stone surfaces
AssigneeLarac S.p.A.
InventorsGiuseppe Pizzigoni, Paolo Parrini
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Abstract
Compositions for the desulphatizing cleaning of stone surfaces of prevailingly carbonatic nature or of layers of such nature on different materials, consisting of a mixture of an anion exchange material (for instance an anionic exchange resin) with an aqueous solution of ammonium carbonate and optionally with additives.
Claims6
A composition for the desulphatizing cleaning of stone surfaces having a prevailingly carbonatic composition or of layers of such nature on different materials, which composition comprises a mixture of a material of anion exchange with an aqueous solution of ammonium carbonate.
Dependencies are inferred from the claim text.